AMPP Internal Corrosion Specialist
Theory Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
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1. What is the primary difference between internal and external
corrosion of a pipeline?
A. Internal corrosion occurs only in crude oil pipelines
B. Internal corrosion originates from the external environment
C. Internal corrosion occurs on surfaces exposed to the transported fluid or
internal environment
D. Internal corrosion is always caused by oxygen
Answer: C. Internal corrosion occurs on surfaces exposed to the
transported fluid or internal environment
Rationale: Internal corrosion develops on equipment surfaces exposed to
the process fluid, contaminants, water, gases, deposits, or other internal
conditions.
, 2. Which factor is generally essential for aqueous corrosion of carbon
steel?
A. Dry nitrogen
B. An electrolyte such as water
C. Vacuum
D. Pure hydrocarbon without water
Answer: B. An electrolyte such as water
Rationale: Electrochemical corrosion requires an electrolyte that permits
ionic transport. In many oil and gas systems, water provides this
electrolyte.
3. In a typical electrochemical corrosion cell, the anodic reaction
involves:
A. Reduction
B. Oxygen absorption only
C. Oxidation of the metal
D. Hydrogen reduction only
Answer: C. Oxidation of the metal
Rationale: At the anode, metal atoms lose electrons and enter the
electrolyte as ions. This oxidation process represents metal loss.
, 4. What occurs at the cathode during an electrochemical corrosion
reaction?
A. Metal dissolution
B. A reduction reaction consumes electrons
C. Metal always becomes positively charged
D. The anode disappears
Answer: B. A reduction reaction consumes electrons
Rationale: Cathodic reactions consume electrons generated at anodic sites.
Common cathodic reactions include hydrogen-ion reduction and oxygen
reduction.
5. Which chemical is commonly associated with internal corrosion in oil
and gas production systems?
A. Helium
B. Argon
C. Carbon dioxide
D. Neon
Answer: C. Carbon dioxide
Rationale: Dissolved CO₂ can form carbonic acid in water, increasing
corrosivity and contributing to carbon steel corrosion.
, 6. What is commonly produced when carbon dioxide dissolves in water?
A. Sulfuric acid
B. Nitric acid
C. Carbonic acid
D. Hydrochloric acid
Answer: C. Carbonic acid
Rationale: CO₂ reacts with water to establish carbonic acid and associated
bicarbonate/carbonate equilibria, which can influence corrosion behavior.
7. Which gas is commonly associated with microbiologically influenced
corrosion and sulfide formation?
A. Oxygen
B. Nitrogen
C. Hydrogen sulfide
D. Hydrogen
Answer: C. Hydrogen sulfide
Rationale: Sulfate-reducing microorganisms can contribute to sulfide
production under suitable conditions, and sulfide can significantly affect
corrosion and metallurgy.
8. What does MIC stand for?
Theory Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
Download Pdf
1. What is the primary difference between internal and external
corrosion of a pipeline?
A. Internal corrosion occurs only in crude oil pipelines
B. Internal corrosion originates from the external environment
C. Internal corrosion occurs on surfaces exposed to the transported fluid or
internal environment
D. Internal corrosion is always caused by oxygen
Answer: C. Internal corrosion occurs on surfaces exposed to the
transported fluid or internal environment
Rationale: Internal corrosion develops on equipment surfaces exposed to
the process fluid, contaminants, water, gases, deposits, or other internal
conditions.
, 2. Which factor is generally essential for aqueous corrosion of carbon
steel?
A. Dry nitrogen
B. An electrolyte such as water
C. Vacuum
D. Pure hydrocarbon without water
Answer: B. An electrolyte such as water
Rationale: Electrochemical corrosion requires an electrolyte that permits
ionic transport. In many oil and gas systems, water provides this
electrolyte.
3. In a typical electrochemical corrosion cell, the anodic reaction
involves:
A. Reduction
B. Oxygen absorption only
C. Oxidation of the metal
D. Hydrogen reduction only
Answer: C. Oxidation of the metal
Rationale: At the anode, metal atoms lose electrons and enter the
electrolyte as ions. This oxidation process represents metal loss.
, 4. What occurs at the cathode during an electrochemical corrosion
reaction?
A. Metal dissolution
B. A reduction reaction consumes electrons
C. Metal always becomes positively charged
D. The anode disappears
Answer: B. A reduction reaction consumes electrons
Rationale: Cathodic reactions consume electrons generated at anodic sites.
Common cathodic reactions include hydrogen-ion reduction and oxygen
reduction.
5. Which chemical is commonly associated with internal corrosion in oil
and gas production systems?
A. Helium
B. Argon
C. Carbon dioxide
D. Neon
Answer: C. Carbon dioxide
Rationale: Dissolved CO₂ can form carbonic acid in water, increasing
corrosivity and contributing to carbon steel corrosion.
, 6. What is commonly produced when carbon dioxide dissolves in water?
A. Sulfuric acid
B. Nitric acid
C. Carbonic acid
D. Hydrochloric acid
Answer: C. Carbonic acid
Rationale: CO₂ reacts with water to establish carbonic acid and associated
bicarbonate/carbonate equilibria, which can influence corrosion behavior.
7. Which gas is commonly associated with microbiologically influenced
corrosion and sulfide formation?
A. Oxygen
B. Nitrogen
C. Hydrogen sulfide
D. Hydrogen
Answer: C. Hydrogen sulfide
Rationale: Sulfate-reducing microorganisms can contribute to sulfide
production under suitable conditions, and sulfide can significantly affect
corrosion and metallurgy.
8. What does MIC stand for?
